JAVASCRIPT

how to read environment variable in node js

var myEnvVariable = process.env.ENV_VARIABLE_NAME

get environment variables in node js

console.log(app.get('env'))

if(app.get('env').toLowerCase()==="development"){
    app.use(morgan("dev"))
}

how can you set an environment variable in node

process.env.FOO = "bar"
console.log(process.env.FOO) // "bar"

node using environment variable

// server.js
console.log(`Your port is ${process.env.PORT}`); // undefined
const dotenv = require('dotenv');
dotenv.config();
console.log(`Your port is ${process.env.PORT}`); // 8626